Sales Tax Calculator
Add sales tax to a price or work back from a tax-inclusive total, with state base rates.
Tax = price × rate, and total = price × (1 + rate). $100 at 7.25% sales tax is $7.25 tax, $107.25 total. To remove tax, divide the total by (1 + rate): $107.25 ÷ 1.0725 = $100.
Free, runs in your browser. Nothing you enter is uploaded.
How to use it
- Choose add tax or remove tax.
- Enter the price or total and pick a state or type a rate (add your local rate if any).
- Read the tax amount, pre-tax price and total.
What you enter
- Price or total
- Tax rate or state
What you get
- Tax amount
- Pre-tax price
- Total
Formula
Tax = P × r | Total = P × (1 + r) | Pre-tax price = Total ÷ (1 + r)
Worked example
Input: $100 in California (7.25% base)
Result: Tax $7.25, total $107.25
Local district taxes can raise the combined rate above 10% in some cities.
Questions
How do I calculate sales tax?
Convert the rate to a decimal and multiply by the price. 8% of $45 is 0.08 × 45 = $3.60.
How do I find the price before tax?
Divide the total by 1 plus the rate. A $54 total at 8% is 54 ÷ 1.08 = $50 before tax.
Which states have no sales tax?
Alaska, Delaware, Montana, New Hampshire and Oregon have no statewide sales tax, although some Alaska towns charge local tax.
Why is my receipt rate higher than the state rate?
Counties, cities and special districts add local taxes on top of the state rate. Enter the combined rate for your location.
Limitations
- State base rates only; local rates and product exemptions vary.
References
More Math & Finance
- Percentage & Percent Change Calculator
- Tip Calculator (Split the Bill)
- Discount Calculator (Sale Price and % Off)
All free tools · By Dr. Zubair Khalid, DVM, MS, PhD.